What classification system is used for utility patents and applications?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-27 2 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. Utility patents, applications, and patent application publications are classified under the Cooperative Patent Classification (CPC) system. As stated in MPEP 903 : “Utility patents, applications, and patent application publications receive a classification designation under the Cooperative Patent Classification (CPC) system.” The CPC system is a joint classification system developed by the European Patent Office (EPO) and the United States Patent and Trademark Office (USPTO) to harmonize patent classification internationally. Related Rules from the Manual of Patent Examining Procedure 2 rules Collapse Utility Patents and Applications Require CPC Classification MPEP 903 Design and Plant Patent Classification Required MPEP 903 Other Related FAQs 5 FAQs Collapse How is the classification of a new patent application determined? What is the difference between basic subject matter and features for additional purposes in patent classification? How does the USPC system classify subcombinations of general utility? Where can I find more information about the Cooperative Patent Classification (CPC) system? What types of documents are included in the patent classification system?